feat: 新增企微 Delta 模式相关配置读取函数

Co-authored-by: Cursor <cursoragent@cursor.com>

daily/config.py

@@ -3,13 +3,11 @@
 from __future__ import annotations
 
 import os
-import sys
 from pathlib import Path
 
 from dotenv import load_dotenv
 
 ROOT = Path(__file__).resolve().parent.parent
-BOT_DIR = ROOT / "bot"
 OUTPUT_DIR = ROOT / "output"
 LOG_DIR = ROOT / "logs"
 CACHE_DIR = ROOT / ".cache"
@@ -45,16 +43,11 @@ def wecom_max_bytes() -> int:
     """兼容旧配置名。"""
     return wecom_chunk_bytes()
 
+
 load_dotenv(ROOT / ".env")
 load_dotenv(ROOT / ".env.local", override=True)
 
 
-def ensure_bot_on_path() -> None:
-    bot = str(BOT_DIR)
-    if bot not in sys.path:
-        sys.path.insert(0, bot)
-
-
 def _clean_env_value(raw: str | None) -> str | None:
     if raw is None:
         return None
@@ -79,3 +72,32 @@ def env_int(key: str, default: int) -> int:
         return int(raw)
     except ValueError:
         return default
+
+
+def env_bool(key: str, default: bool) -> bool:
+    raw = env(key)
+    if raw is None:
+        return default
+    return raw.strip().lower() in {"1", "true", "yes", "on"}
+
+
+def wecom_mode() -> str:
+    raw = (env("DAILY_WECOM_MODE") or "delta").strip().lower()
+    return raw if raw in {"full", "delta"} else "delta"
+
+
+def news_dedup_days() -> int:
+    return max(1, env_int("DAILY_NEWS_DEDUP_DAYS", 7))
+
+
+def skip_push_when_silent() -> bool:
+    return env_bool("DAILY_SKIP_PUSH_WHEN_SILENT", True)
+
+
+def delta_baseline_fallback() -> str:
+    raw = (env("DAILY_DELTA_BASELINE_FALLBACK") or "full").strip().lower()
+    return raw if raw in {"full", "empty"} else "full"
+
+
+def force_push() -> bool:
+    return env_bool("DAILY_FORCE_PUSH", False)